Ink cartridge



FIG. 1 is a perspective view of an ink cartridge, as viewed from the front, bottom and left side, embodying my new design;

FIG. 2 is a perspective view thereof, as viewed from the front, top and left side;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top view thereof;

FIG. 8 is a bottom view thereof; and,

FIG. 9 is a perspective view thereof, as viewed from the rear, bottom and left side. 

The ornamental design for an ink cartridge, as shown and described. 